Battery Case Venting for Pressure Balance and Condensation Control
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Solution Overview
Problem
Batteries face safety hazards due to the generation of condensed liquid in high-temperature and high-humidity environments, which can lead to potential safety risks.
Innovation Solution
The integration of a ventilation assembly with pressure balancing mechanisms in the battery case, allowing for active air circulation to discharge high-temperature and high-humidity air, thereby preventing the formation of condensed liquid and enhancing safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the battery case is sealed to protect internal components, then protection against external contaminants is improved, but pressure buildup and heat dissipation are worsened
Solution Approach 1:
The pressure balancing mechanism is implemented locally at specific positions on the battery case rather than making the entire case structure complex. The mechanism includes a pressure balancing hole and a valve structure that selectively opens/closes based on pressure differential, providing localized pressure relief while maintaining overall case sealing for contaminant protection.
Solution Approach 2:
The pressure balancing mechanism uses a dynamic valve structure that automatically opens when internal pressure exceeds external pressure and closes when pressures equalize. This dynamic response allows the case to maintain sealing under normal conditions while automatically relieving pressure buildup, resolving the contradiction between sealed protection and pressure management.
2Reliability
If the battery case is sealed to protect internal components, then protection against external contaminants is improved, but heat dissipation is worsened
Solution Approach 1:
The ventilation assembly is locally integrated with the pressure balancing mechanism at specific positions on the battery case. This localized design provides heat dissipation pathways without requiring the entire case to be opened or made complex, thus maintaining contaminant protection while enabling thermal management.
Solution Approach 2:
The pressure balancing mechanism with integrated ventilation assembly provides continuous pressure equalization and heat dissipation functionality. The mechanism operates continuously to maintain pressure balance and facilitate heat release, ensuring sustained thermal management while the case remains sealed for protection.
3Stress or pressure
If a pressure balancing mechanism is added to the battery case, then pressure balance is improved, but device complexity is worsened
Solution Approach 1:
The ventilation assembly is merged with the pressure balancing mechanism into a single integrated structure. The ventilation holes are formed within the pressure balancing mechanism body, combining pressure equalization and ventilation functions in one component rather than using separate mechanisms, thus reducing overall structural complexity.
Solution Approach 2:
The pressure balancing mechanism serves multiple functions: it balances internal and external pressure, provides ventilation pathways for heat dissipation, and prevents contaminant ingress when closed. This multi-functionality reduces the need for additional separate components, simplifying the overall battery case structure despite the added functionality.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively prevents the formation of condensed liquid, thereby enhancing the safety and performance of batteries by ensuring timely discharge of hazardous air, even when used in existing structures without additional assemblies.
Implementation Method 1
a magnet for attracting a valve plate of the pressure balancing mechanism
Implementation Method 2
a driving mechanism connected to the magnet and used to drive the magnet to move in a direction away from the case
Implementation Method 3
an air flow channel that is in communication with the inside of the case when the pressure balancing mechanism is opened
Data Source
AI summary
Provided are a case of a battery, a battery, a power consuming apparatus, and a method and apparatus for manufacturing a battery. The case is provided with at least two pressure balancing mechanisms, the pressure balancing mechanisms being used to balance the pressure inside and outside the case, and the at least two pressure balancing mechanisms being connected to a ventilation assembly at an outer side of the case, wherein a first ventilation assembly connected to a first pressure balancing mechanism in the at least two pressure balancing mechanisms is used to open the first pressure balancing mechanism to introduce air into the case, and a second ventilation assembly connected to a second pressure balancing mechanism in the at least two pressure balancing mechanisms is used to open the second pressure balancing mechanism so that the air in the case is discharged. According to some embodiments, the safety of the battery can be enhanced.